Ministry of Education
IIT Kharagpur Research Model Shows SARS-Cov-2 Alters Lung Cell Metabolism, Opens Avenues of Therapeutics
Kolkata, April 14, 2021
The steady rise of COVID-19 pandemic has been posing unprecedented threats to the entire world. Among its many perils, is the cellular metabolic system of those who test positive. Coronaviruses are known to hijack the metabolism of lung cells. This threat makes it absolutely imperative to understand the mechanism of metabolic reprogramming of host human cells by SARS-CoV-2.
Researchers at IIT Kharagpur have, for the first time, reported a method to find an alteration in the metabolic reaction rates inside the lung cells when they are affected by the virus or pathogens. As the method finds and reports critical aspects of physiology, which are affected by SARS-CoV-2 infection, it will enable the discovery of therapeutic targets.
"We have used the gene expression of normal human bronchial epithelial cells  infected with SARS-CoV-2 along with the macromolecular make-up of the virus to create this integrated genome-scale metabolic model. The growth rate predicted by the model showed a very high agreement with experimentally and clinically reported effects of SARS-CoV-2," said Dr. Amit Ghosh, Assistant Professor, School of Energy Science & Engineering, IIT Kharagpur.
Deliberating on this new development researcher Piyush Nanda  explained, “In this model development, we have explored how metabolism works and how it is altered in diseases. Our work involved measuring how the tens of thousands or more complex chemical reactions change when biological cells are intruded on by an uninvited guest like SARS-CoV-2, which would help improve our understanding of diseases.”
Scientists have been trying to extract information from the human genome sequences for the past two decades to gather a better understanding of genetic disorders thus allowing us to penetrate deeper into the fabric of life and enable better therapeutics.
"Analysis of the intercellular metabolic fluxes  in disease biology is opening up new avenues for therapeutic interventions. Numerous diseases lead to metabolic pathway alterations and it is becoming increasingly important to be able to quantify the difference under normal and diseased conditions. Using our method we have observed the alterations between diseased and normal metabolic states in the case of SARS-CoV-2 infection which have been proven using patients data. The model will allow researchers to understand the wide spectrum of viruses that manipulate human metabolism and will help to design better therapeutics in COVID-19 treatment leveraging the power of systems biology," Remarked Dr. Ghosh.
Using the power of genomics the researchers posed the operation of reactions as a set of mathematical equations and solved it to obtain which reactions are altered in the cells when SARS-CoV-2 infects a person. “A better understanding of metabolic reprogramming would aid in the design of better therapeutics to deal with the COVID-19 pandemic,” stated Piyush.
Further, the researchers have identified pathways like fatty acid synthesis and lipid metabolism that can be targeted by novel drugs. This model is based on genome-scale differential flux analysis  in context-specific metabolic models.
In the case of SARS-CoV-2 infection, the researchers predict that lipid metabolism particularly fatty acid oxidation, cholesterol biosynthesis and beta-oxidation cycle along with arachidonic acid metabolism to be most affected which was confirmed with clinical metabolomics studies.
The research was published in the international journal PLOS Computational Biology